Materials Data on KCO2 by Materials Project
KCO2 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. K1+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.86–2.94 Å. C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.27 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four equivalent K1+ and one C3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four equivalent K1+ and one C3+ atom.